观看免费视频 Smithsonian Science Education Center

(40.7 MB) 添加日期25 Jan 2017 播放155次 儿童 鸟类 科学 History Trailer Time-Lapse Camera
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Smithsonian Science Education Center

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The Smithsonian Science Education Academies for Teachers has completed their week focusing on biodiversity. Check out some of the highlights of what our amazing teachers have learned.